Pipe-covering



(No Model.)

G. B. MANVILLE.

PIPE COVERING- w M Z THE Gama PETERS 60., vnnTu-uwn, msmxai'ou, u. c.

UNITED STATES .PATENT OFFICE.

CHARLES B. MANVILLE, OF MIIAVAUKEE, \VISCONSIN.

PIPE-COVERING.

SPECIFICATION forming part of Letters Patent No. 465,701, dated December22, 1891.

Application filed August 11, 1890- SerialNo. 361,655- (No specimens.)

To all whom 71!; may concern:

Be it known that I, CHARLES B. MANVILLE, of Milwaukee, in the county ofMilwaukee and State of \Visconsin, have invented a new and usefulImprovement in Pipe-Coverings, of which the following is a description,reference being had to the accompanying drawing, which is a part of thisspecification.

My invention relates to a covering particularly adapted for envelopingsteam-boilers, steam-pipes, or hot-blast pipes to prevent the radiationof heat therefrom.

The single drawing accompanying this specification represents a pipewith my improved covering, the layers of the covering being severallybroken away so as to show the construction of interior portions.

A is a pipe adapted for carrying steam or for hot-blast use.

B is the first or inner layer or coat of my covering.

0 is the secondlayer or coat of m y covering.

D is a strip of cloth wound about the sec ond layer of the covering tosecure it permanently on the pipe. E is a third layer or coat, which isused only in connection with hot-blast pipes, as the two inner coveringsare quite sufficient alone with steam-pipes.

F is a wire or metal screen drawn about the covering on the outside toretain it permanently in place, this metal wire or screen beihg requiredand used onlyin case of the covering of hot-blast pipes.

G is a thin outside finishing-coat over the wire or screen, and in caseonly two main coats of the covering material are used with a clothbandage around them, then a similar finishing-coat is put on over thecloth bandage.

The main or principal material which I use in the construction of mycovering is graphite or plumbago in a pulverized form. I also use someclay, wool-shoddy dust, and a small amount of dextrine or glue mingledwith the graphite for a body or binding material. The clay and dextrineor glue are preferably used in the composition; but graphite with properbinding material, as wool shoddy or woolshoddy dust, can be used aloneif properly secured to the protected pipe or boiler. The composition ofthe inner or first coat is made up of the materials and preferably inabout the proportions following: pulverized graphite, two barrels;pulverized clay, one barrel; dextrine or glue, one-half pound;wool-shoddy dust,one hundred pounds. Forthe second coat the compositionincludes the same material as in the composition for the first coat, butin the following proportions: pulverized graphite, one barrel;pulverized clay, one barrel; dextrine or glue, two pounds; wool-shoddydust, four hundred pounds. hen a third coating is put on, which is onlynecessary on hot-blast pipes, I use the same materials and in the sameproportions as for the first coat.

The materials mentioned for the covering are prepared by thoroughlymixing them together, adding sufficient water to make the mass somewhatplastic, and in such condition the material is applied first to thesurface of the pipe in sufficient quantity to form a layer of suchthickness about the pipe as is desired.

This coat will dry or set in a comparatively,

short time when the second coat, prepared in a similar manner, is puton, which second coat is preferably covered by winding about it inspiral form a strip of cloth D to secure the mass of materialpermanently about the pipe. \Vith steam-pipes two coats of this materialput on and secured in the manner described are allthat is required toproperly cover the pipe and prevent radiation of heat therefrom; but inhot-blast pipes, where the heatis so great as to raise the pipe itselfto a red heat, I add a third and outer coat prepared in substantiallythe manner hereinbcfore described, which is sccured in place by wire orwire screen placed about the covering and se cured thereto, so as toretain the covering in place on the pipe.

A thin outer finishing coat G, of the same material as is used for thefirst coat, is put on over the cloth bandage. hen in case of steam-pipesor boilers two main coats only of the covering are used and when onhot-blast pipes three main coats and a Wire or metal screen bandage areput on, a similar finishing coat is put over the wire or screen. Incoveringhot-blast pipes the cloth bandage over the second coat isomitted.

\V hat I claim as new, and desire to secure by Letters Patent, is

1. A composition of matter for pipe and proportions andmannersubstantially as deboiler covering,v consisting of graphite, clay,scribed. Wool-shoddy dust, with glue or dextrine, com- In testimonywhereof I aflix my signature in bined in the proportions and mannersubstanpresence of two Witnesses.

5 tially as described. CHARLES E. MANVILLE.

2. In a composition of matter for pipe and boiler covering, thecombination of graphite, Wool-shoddy dust, and glue or dextrine, in theWitnesses:

C. T. BENEDICT, ANNA FAUST.

